What years of MGB wiring diagrams are included in this manual?

Section Nb (page 311) lists wiring diagrams for MGB positive earth 1962-1964 (Tourer only), positive earth 1964-1967 (Tourer) and 1965-1967 (GT), and negative earth versions for 1967-1968, 1968-1969, 1968-1970, 1969-1970, 1970-1971 and 1971-1972 (Tourer and GT), including a 1971-1972 version with seat belt warning.

What page covers the MGB electrical system?

The Electrical System (Section N) begins on page 263, Special Requirements (Na) on page 303, and Wiring Diagrams (Nb) on page 311.

Where is the braking system covered?

Section M, The Braking System, starts on page 245, and Section Ma, The Braking System (Tandem Master Cylinder), starts on page 259.

What tuning stages does the Special Tuning Manual describe?

Section C (page 451) covers Stage 1 (port polishing), Stage 2 (middle-range acceleration), Stage 3/3A (9.6 to 9.8:1 compression), Stage 3B (10.5:1), Stage 4 (9.3 to 9.5:1), Stage 5 (9.3 to 9.5:1 with Weber carburetor), and Stage 6 (10.4 to 10.6:1 compression, competition tune).

What starter and alternator models are referenced for the MGB?

The electrical system section references the M418G pre-engaged starter, the 2M100 pre-engaged starter motor, and 16AC and 16ACR alternators, plus the RB340 control box and 4TR control unit.

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MGB Tourer & GT 1962-1972 Workshop Manual Table of Contents - Wiring & Tuning

MGB workshop manual index: braking, electrical, lubrication and body sections

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Workshop manual index covering the MGB braking system (Lockheed servo, tandem master cylinder), electrical system (RB340 control box, dynamo, starter, fuses) and body/lubrication chapters with diagram keys.

AI caption September 2012 · Photo 83 of 101

This page is a table of contents (page xi) from an MGB workshop manual compilation covering the MGB Tourer and GT. It lists chapters M through S of the main workshop manual: the braking system (page 245), braking system with tandem master cylinder (259), the electrical system (263), electrical system special requirements (303), electrical system wiring diagrams (311), wheels and tires (327), the body (335), body special requirements (363), service tools (369), lubrication chart (392), and engine emission control supplement (393). The wiring diagrams section enumerates diagrams and keys for MGB positive earth 1962-1964 and 1964-1967, and negative earth versions covering 1967 through 1972 for both Tourer and GT, including versions for cars fitted with equipment conforming to local regulations and a 1971-1972 version with seat belt warning. The lower half indexes Section 4, the Official Special Tuning Manual for the MGB Tourer and GT: getting the best from your MGB (447), general data (447), tuning stages 1 through 6 with compression ratios (451), other special items (452), competition equipment (459), and optional extras (460). Component references include the RB340 control box, 16AC/16ACR alternators, M418G starter, 4TR control unit, 2M100 starter motor, and GHN4/GHD4/GHN5/GHD5 body codes.

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Frequently asked questions

What years of MGB wiring diagrams are included in this manual?: Section Nb (page 311) lists wiring diagrams for MGB positive earth 1962-1964 (Tourer only), positive earth 1964-1967 (Tourer) and 1965-1967 (GT), and negative earth versions for 1967-1968, 1968-1969, 1968-1970, 1969-1970, 1970-1971 and 1971-1972 (Tourer and GT), including a 1971-1972 version with seat belt warning.
What page covers the MGB electrical system?: The Electrical System (Section N) begins on page 263, Special Requirements (Na) on page 303, and Wiring Diagrams (Nb) on page 311.
Where is the braking system covered?: Section M, The Braking System, starts on page 245, and Section Ma, The Braking System (Tandem Master Cylinder), starts on page 259.
What tuning stages does the Special Tuning Manual describe?: Section C (page 451) covers Stage 1 (port polishing), Stage 2 (middle-range acceleration), Stage 3/3A (9.6 to 9.8:1 compression), Stage 3B (10.5:1), Stage 4 (9.3 to 9.5:1), Stage 5 (9.3 to 9.5:1 with Weber carburetor), and Stage 6 (10.4 to 10.6:1 compression, competition tune).
What starter and alternator models are referenced for the MGB?: The electrical system section references the M418G pre-engaged starter, the 2M100 pre-engaged starter motor, and 16AC and 16ACR alternators, plus the RB340 control box and 4TR control unit.

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